If you don't know about Redbox, you probably should. They have more than 17,500 kiosks that look like bright red soda vending machines, except they deliver DVDs instead of soft drinks. A rental costs $1 per night, and you can return it to any kiosk -- not just the one where you rented it -- which is great for travelers. Redbox partners with major retailers including Walmart, McDonald's, and Walgreens,...